Abstract: This portable weighing system for aircraft includes a plurality of individual load cells which are connected to a central computing and display unit capable of storing dimensional characteristics of commonly encountered aircraft. The computer within the central unit compensates by its programming for nonlinearities in the response of the load cells. The output display can include aircraft gross weight, center of gravity (optionally displayed as percentage of the mean aerodynamic chord). Interactive capability is also provided to facilitate input of aircraft dimensional characteristics which are not already contained within the memory of the central unit.